diff --git a/src/alfasim_sdk/_internal/alfacase/case_description.py b/src/alfasim_sdk/_internal/alfacase/case_description.py
index 72e3149a..804b6a66 100644
--- a/src/alfasim_sdk/_internal/alfacase/case_description.py
+++ b/src/alfasim_sdk/_internal/alfacase/case_description.py
@@ -3359,7 +3359,10 @@ class PhysicsDescription:
     correlations_package = attrib_enum(
         default=constants.CorrelationPackageType.Classical
     )
-    fluid_material_convection_correlation = attrib_enum(default=constants.FluidMaterialConvectionCorrelation.HasanKabir1994)
+    fluid_material_convection_correlation = attrib_enum(
+        default=constants.FluidMaterialConvectionCorrelation.HasanKabir1994
+    )
+
 
 @attr.s()
 class TimeOptionsDescription:
diff --git a/src/alfasim_sdk/_internal/constants.py b/src/alfasim_sdk/_internal/constants.py
index c6dd64a1..c8466087 100644
--- a/src/alfasim_sdk/_internal/constants.py
+++ b/src/alfasim_sdk/_internal/constants.py
@@ -540,6 +540,7 @@ class ForchheimerCoefficientsOption(Enum):
     ReservoirParameters = "reservoir_parameters"
     FlowCoefficients = "flow_coefficients"
 
+
 class FluidMaterialConvectionCorrelation(Enum):
     """
     The heat transfer mechanism for fluid materials composed by a parcel of radiation and